body{
    display: flex;
    flex-direction: column;
    header{
        width: 100%;
        height: 44px;
        line-height: 44px;
    }
    main {
        width: 100%;
        background: url(../../assets/imgs/advertisement-bg.jpg) center no-repeat;
        background-size: cover;
        flex: 1;
        overflow: scroll;
        position: relative;
        div{
            width: 105px;
            height: 40px;
            display: flex;
            background: #fff;
            border-radius: 20px;
            align-items: center;
            justify-content: center;
            position: absolute;
            top: 20px;
            right: 20px;
            .xian{
                display: block;
                width: 1px;
                height: 25px;
                background: #bbb;
                margin: 0 10px;
            }
        }
        h1{
            width: 100%;
            position: absolute;
            bottom: 20%;
            animation: run 0.7s linear ;
        }
    }
}
@keyframes run {
    from{
        opacity: 0;
        font-size: 12px;
        bottom: 50%;
    }
    to{
        opacity: 1;
        bottom: 20%;
    }
    
}

